| Sintra to Buenaventura Lakes (Florida) | 4,100.81 mi (6,599.62 km) |
| Sintra to Buffalo (Minnesota) | 4,157.77 mi (6,691.29 km) |
| Sintra to Buffalo (New York) | 3,536.34 mi (5,691.18 km) |
| Sintra to Buffalo Grove (Illinois) | 3,983.31 mi (6,410.52 km) |
| Sintra to Buford (Georgia) | 4,040.65 mi (6,502.79 km) |
| Sintra to Bull Run (Virginia) | 3,577.33 mi (5,757.15 km) |
| Sintra to Bullhead City (Arizona) | 5,446.32 mi (8,765.01 km) |
| Sintra to Burbank (California) | 5,650.78 mi (9,094.05 km) |
| Sintra to Burbank (Illinois) | 3,986.88 mi (6,416.26 km) |
| Sintra to Burien (Washington) | 5,191.95 mi (8,355.63 km) |
| Sintra to Burkburnett (Texas) | 4,759.19 mi (7,659.17 km) |
| Sintra to Burke (Virginia) | 3,564.65 mi (5,736.75 km) |
| Sintra to Burke Centre (Virginia) | 3,566.12 mi (5,739.11 km) |
| Sintra to Burleson (Texas) | 4,758.91 mi (7,658.73 km) |
| Sintra to Burley (Idaho) | 5,091.73 mi (8,194.35 km) |
